Repair Design for Concrete Structures Damaged by Chloride Corrosion of Reinforcement
| Project/Area Number |
62550348
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
コンクリート工学・土木材料・施工
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| Research Institution | Kyoto University |
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Principal Investigator |
MIYAGAWA Toyoaki Instructor, Dept. of Civil Eng., Faculty of Eng., Kyoto University, 工学部, 助手 (80093318)
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| Project Period (FY) |
1987 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1988: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1987: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Repair Design / Durability Design / Surface Treatment / Reinforced Concrete / Diffusion of Oxygen / Diffusion of Water / Diffusion of Chloride Ion / 塩化物腐食 / 塩害 / コンクリート構造物 / ひびわれ追従性 / 補修 / ライニング / 物質透過性 |
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| Research Abstract |
Permeability performance of surface treated concrete using synthetic resin is examined experimentally. Transmission rates of oxygen, liquid phase water and vapor phase water through surface treatment - concrete system are measured. And fundamental concept of durability design against reinforcement corrosion is discussed.
The conclusions in this project are summarized as follows;
1. The coefficient of oxygen diffusion, which is measured using electrochemical model specimens, is ranged between 10^<-5>-10^<-6>cm^2/s in concrete.
2. Transmission abilities decrease with increasing surface treatment thickness and decreasing water cement ratio of concrete.
3. While, epoxy lining or MMA impregnation is a water proofing system, silan impregnation, silan with polymer cement mortar coating or urethane lining is a water phobic system.
4. Concrete surface treatement can't elongate the service life of chloride damaged reinforced concrete member, unless chloride contaminated cover concrete is removed.
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Report
(3 results)
Research Products
(4 results)
